search for: from_blob

...l to change_geometry with an explicit size (''110x'') as the geometry string: def make_thumb (the_img) require ''RMagick'' size = "110x" debugger if ENV[''RAILS_ENV''] == ''development'' img = Magick::Image.from_blob(the_img.img_data).first img.change_geometry(''110×'') {|cols, rows, i| i.resize! (cols,rows) } # img.change_geometry("110×") {|cols, rows, i| i.resize! (cols,rows) } # img.change_geometry("#{size}") {|cols, rows, i| i.resize! (cols,rows) } end .....

...iece of code takes an uploaded image and resizes it. It''s a bit nasty at the moment as I am still messing around with it. What I can''t understand is why it works for one iteration but then fails with: zero-length blob not permitted `'' On the line: img = Magick::Image.from_blob(self.image).first I am basically doing this in the controller and it fails on the second attempt - to resize and save the medium size image: if @params[:listing_image] @thumbnail_image = ListingImage.new(@params[:listing_image]) @listing = @session[:listing] @thumbna...

...RMagick. But the animated gif which i read was witten in my folder without animation. What should i do to write the gif image with animation. Here is my code to read and write image while uploading. image = params[:image][:blob] image1=params[:image][:blob].original_filename imgs = Magick::Image.from_blob(image.read) img = imgs.first File.open(RAILS_ROOT + "/public/images/banner/" + image1 , "wb") do |f| f.write(img.to_blob) end could anyone suggest me to solve this issue Thanks in advance, Regards, Jose Martin -- Posted via http://www.ruby-forum.com/. --~--~---------~--~...

...Comment < ActiveRecord::Base belongs_to :board has_many :uploads end class Upload < ActiveRecord::Base belongs_to :comment end class Image < Upload before_create :create_image before_create :create_thumbnail def create_image @image = Magick::ImageList.new.from_blob(@upload_blob) self[:image_width] = @image.columns self[:image_height] = @image.rows end def create_thumbnail @thumbnail = Magick::ImageList.new.from_blob(@image[0].to_blob) if comment.parent_id == nil x = comment.board.setting(:parent_thumbnail_at_width) y = comm...

I''m trying to read image data from an upload file field directly into an RMagick image object without having to temporally save the image file first. Assuming my file field param is assigned to @temp_file, i tried RMagicks from_blob method: img = Magick::Image::from_blob(@temp_file.read) But i get an error message saying that the blob is empty. I also tried feeding it the entire IOString object returned by the file field, but it can''t deal with it either. Anybody knows how this can be done? Thanks. sebastian

Hi, I need to take a single uploaded image file and save three resized versions of it, a thumbnail, normal and large version. I was planning on doing this in my model by having an array of geometry strings and looping through them, each time saving a new image object resized to the correct geometry. I know that file column does similar stuff, but I would prefer to have a separate database row

Greetings all, This is the first release of the SuperImage plugin. The idea is you upload images to the database, and then pull them out at any size you want. Combine this with caching and it will stay light and fast. More info and instructions are here: http://beautifulpixel.textdriven.com/articles/2006/04/27/superimage-plugin-making-resizeable-uploaded-images-easy svn:

I have two problems. I have a comment that has_many uploads. Before saving the comment, I want to be sure that the upload(s) has passed validation, but I also need to validate in other ways. For example, I do not want to save the comment if there is no comment or upload. Or, I do not want to save the comment if the image has been uploaded previously (comparing md5s with past upload md5s

...ta.original_filename) write_attribute("file_size", file_data.size) read_attributes(file_data) end I also want to read the attributes of the EXIF data embedded in the picture doing something like this (this the short form): def read_attributes(file_data) img = Magick::Image.from_blob(file_data.read) camera_makeimg.get_exif_by_entry(''Make'') write_attribute("camera_make", camera_make) end However, when I do this I get an error of: undefined method `get_exif_by_entry'' for [ JPEG 3504x2336 3504x2336+0+0 DirectClass 8-bit 3544kb]:Arr...

...pdate => "img", :url => {:action => "flip"} )%> <div id="img"></div> controller: def flip filename="/public/picture/filename/1/scaler_1.jpg" img=File.read(filename) ilist = Magick::ImageList.new @picture=ilist.from_blob(img) @picthumb=@picture.flip! @out=@picthumb.to_blob send_data(@out,:filename =>''workshopimage'', :type => "image/png", :disposition => "inline") end the above doesnt work but with my view as <%= link_to("flip", :action =...

I see that the SVN version of the excellent file_column plug-in can create thumbnails using the url_for_image_column helper. This uses Rmagick to create the thumbnail... Quick question... Let''s say the file is a TIFF image - can the helper create a JPG version of the thumbnail for display in the browser? Curious if the plug-in can handle that transform with some creative use of the

Hi! Is it possible to create a new instance of Magick::Image out of uploaded data via file input? Now i save my file to the disk, then read it to create an instance of Magick::Image, resize it and save it again. -- Posted via http://www.ruby-forum.com/.